Use DHCP-provided DNS or not based on connected network












1














My current networking setup (on Arch Linux) involves:





  • stubby to resolve DNS requests with DNS-over-TLS.


  • dnsmasq to cache DNS queries (and nothing else).


  • openresolv to manage resolv.conf.


  • NetworkManager to set-up and tear-down network connections.


I have stubby listening on locahost on some random port, dnsmasq listening on localhost:53 and resolving DNS queries through stubby, and openresolv is set up to put localhost in resolv.conf and provide any other DNS entry (for example those obtained through DHCP by NetworkManager) to dnsmasq via separate configuration files:



# /etc/resolvconf.conf

name_servers=127.0.0.1



dnsmasq_conf=/etc/dnsmasq-conf.conf

dnsmasq_resolv=/etc/dnsmasq-resolv.conf


However, at the moment those extra entries are being ignored.




What is the best way to use these entries only when connected to one of a few whitelisted networks?




To clarify, I know that with NetworkManager I can override the DNS entries provided over DHCP on a network-by-network basis, but what I would like to do is the opposite: use stubby by default and the DHCP entries for only one or two networks, as needed.






linux dns networkmanager dnsmasq resolv.conf







share|improve this question



























    1














    My current networking setup (on Arch Linux) involves:





    • stubby to resolve DNS requests with DNS-over-TLS.


    • dnsmasq to cache DNS queries (and nothing else).


    • openresolv to manage resolv.conf.


    • NetworkManager to set-up and tear-down network connections.


    I have stubby listening on locahost on some random port, dnsmasq listening on localhost:53 and resolving DNS queries through stubby, and openresolv is set up to put localhost in resolv.conf and provide any other DNS entry (for example those obtained through DHCP by NetworkManager) to dnsmasq via separate configuration files:



    # /etc/resolvconf.conf
    
name_servers=127.0.0.1
    

    
dnsmasq_conf=/etc/dnsmasq-conf.conf
    
dnsmasq_resolv=/etc/dnsmasq-resolv.conf


    However, at the moment those extra entries are being ignored.




    What is the best way to use these entries only when connected to one of a few whitelisted networks?




    To clarify, I know that with NetworkManager I can override the DNS entries provided over DHCP on a network-by-network basis, but what I would like to do is the opposite: use stubby by default and the DHCP entries for only one or two networks, as needed.






    linux dns networkmanager dnsmasq resolv.conf







    share|improve this question

























      1












      1








      1







      My current networking setup (on Arch Linux) involves:





      • stubby to resolve DNS requests with DNS-over-TLS.


      • dnsmasq to cache DNS queries (and nothing else).


      • openresolv to manage resolv.conf.


      • NetworkManager to set-up and tear-down network connections.


      I have stubby listening on locahost on some random port, dnsmasq listening on localhost:53 and resolving DNS queries through stubby, and openresolv is set up to put localhost in resolv.conf and provide any other DNS entry (for example those obtained through DHCP by NetworkManager) to dnsmasq via separate configuration files:



      # /etc/resolvconf.conf
      
name_servers=127.0.0.1
      

      
dnsmasq_conf=/etc/dnsmasq-conf.conf
      
dnsmasq_resolv=/etc/dnsmasq-resolv.conf


      However, at the moment those extra entries are being ignored.




      What is the best way to use these entries only when connected to one of a few whitelisted networks?




      To clarify, I know that with NetworkManager I can override the DNS entries provided over DHCP on a network-by-network basis, but what I would like to do is the opposite: use stubby by default and the DHCP entries for only one or two networks, as needed.






      linux dns networkmanager dnsmasq resolv.conf







      share|improve this question













      My current networking setup (on Arch Linux) involves:





      • stubby to resolve DNS requests with DNS-over-TLS.


      • dnsmasq to cache DNS queries (and nothing else).


      • openresolv to manage resolv.conf.


      • NetworkManager to set-up and tear-down network connections.


      I have stubby listening on locahost on some random port, dnsmasq listening on localhost:53 and resolving DNS queries through stubby, and openresolv is set up to put localhost in resolv.conf and provide any other DNS entry (for example those obtained through DHCP by NetworkManager) to dnsmasq via separate configuration files:



      # /etc/resolvconf.conf
      
name_servers=127.0.0.1
      

      
dnsmasq_conf=/etc/dnsmasq-conf.conf
      
dnsmasq_resolv=/etc/dnsmasq-resolv.conf


      However, at the moment those extra entries are being ignored.




      What is the best way to use these entries only when connected to one of a few whitelisted networks?




      To clarify, I know that with NetworkManager I can override the DNS entries provided over DHCP on a network-by-network basis, but what I would like to do is the opposite: use stubby by default and the DHCP entries for only one or two networks, as needed.






      linux dns networkmanager dnsmasq resolv.conf




      linux dns networkmanager dnsmasq resolv.conf






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 42 mins ago









      A.P.

      1737




      1737



























          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "106"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f491473%2fuse-dhcp-provided-dns-or-not-based-on-connected-network%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown






























          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Unix & Linux Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid …



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.





          Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


          Please pay close attention to the following guidance:


          • Please be sure to answer the question. Provide details and share your research!

          But avoid …



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f491473%2fuse-dhcp-provided-dns-or-not-based-on-connected-network%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          -

          Popular posts from this blog

          Accessing regular linux commands in Huawei's Dopra Linux

          Image
          4 Backstory: I have a Huawei HG8245 router in my house and I want to change the default username/password. I've tried following this guide but the config file always gets reset. My ISP isn't helping either so I'm looking for other ways to accomplish this. The router has telnet access so this seems like a way to change the credentials. The first shell I gain access to looks like this: WAP> Pressing "?" gives me a list of available commands which I've pasted here, the two interesting ones are "su" and "shell". I can't seem to get su access, even after logging in as root (challenge password prompt, and then nothing happens), but shell gives me a proper linux shell. WAP>shell BusyBox v1.18.4 (2017-12-26 17:06:34 CST) built-in shell (ash) Enter 'hel...
          Read more

          Can't connect RFCOMM socket: Host is down

          Image
          up vote 3 down vote favorite I have bluez 5.4.3 and I am attempting to communicate with a ble device through minicom. These two deceives (my computer and a bluno nano) are alreadt paired and this has been my method so far. #bluetoothctl # pair xx:xx:xx:xx:xx:xx # exit Everything is working well so far then... #sudo rfcomm connect /dev/rfcomm0 xx:xx:xx:xx:xx:xx 1 & [1] 3665 Can't connect RFCOMM socket: Host is down Does anyone know how to resolve this issue? Any help would be very much appreciated. bluetooth bluez share | improve this question asked Feb 9 '17 at 18:46 Brandon Knape 46 2 ...
          Read more

          Kernel panic - not syncing: Fatal Exception in Interrupt

          Image
          0 Every day this error occured on my pc, kernel panic error on interrupt, what will be the problem? linux-mint share asked 6 mins ago Vinod Selvin Vinod Selvin 1 1 New contributor Vinod Selvin is a new contributor to this site. Take care in asking for clarification, commenting, and answering. Check out our Code of Conduct. add a comment ...
          Read more